I did a custom build. I found a 2008 Trek road bike with 105/Ultegra components for $300 and stripped all the parts, then sold the frame/wheels. Ended up with roughly $175 in the parts. Still had to order canti brakes, headset, cables, etc. I did a good bit of bargain hunting. I'm guessing I have about $800 in the bike as she sits.

http://www.watsonfx.com/surly1.jpg